module Neighbor::Utils

def self.normalize(value, column_info:)
  return nil if value.nil?
  raise Error, "Normalize not supported for type" unless [:cube, :vector, :halfvec].include?(column_info&.type)
  norm = Math.sqrt(value.sum { |v| v * v })
  # store zero vector as all zeros
  # since NaN makes the distance always 0
  # could also throw error
  norm > 0 ? value.map { |v| v / norm } : value
end